Howrah vs Indore
Side-by-side air quality comparison between Howrah and Indore.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Howrah | Indore |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 32.60 |
| PM10(µg/m³) | 72.60 | 47.00 |
| NO₂(µg/m³) | 22.20 | 6.50 |
| SO₂(µg/m³) | 11.50 | 12.50 |
| O₃(µg/m³) | 55.00 | 74.00 |
| CO(µg/m³) | 360.00 | 254.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Indore averaged 84 — a 42-point (50%) gap, with Howrah the more polluted and Indore the cleaner of the two. On 1546 days when both cities reported, Indore was cleaner on 874 of them; the average daily gap was 76 AQI points.
Seasonality & days
Howrah peaks in December, while Indore peaks in November. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Indore was 0% Severe and 45.099999999999994% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Indore 65 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Indore has improved by 47 AQI points (35.9%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Indore hit AQI 359 at Maguda Nagar (IMC) on 2024-09-18.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Indore spans 6 stations with a 69-point spread (min 52, max 121).
Verdict
🏆 Indore has better air quality with an AQI of 55 compared to Howrah's 130. That's a significant difference of 75 points.